Rheingold, Arnold
Inorganic chemistry: Small-molecule crystallography, synthesis of transition metal/p-block clusters

Contact Information
Professor of Chemistry and Biochemistry

Office: 5128
Phone: 858-822-3870
Email: arheingold@ucsd.edu
Web: crystals.ucsd.edu
Group: View group members
1969 Ph.D., University of Maryland
1963 M.S., Case Western Reserve University
1962 B.S., Case Western Reserve University
2003 Professor-in-Residence, Univ of Cal, San Diego
1980 Visiting Professor, SUNY-Buffalo
1980 Professor, University of Delaware
1970 Professor, SUNY-Plattsburgh
Awards and Academic Honors
ACS Award for Distinguished Service in the Advancement of Inorganic Chemistry
Elected Fellow of the American Chemical Society
Chair, ACS Division of Inorganic Chemistry
Elected Fellow of American Association for the Advancement of Science
Research Interests
Recent advances in the instrumentation for small molecule X-ray crystallography have made it possible to complete a full structural characterization of a new material in less time, at less expense and with far less ambiguity than any other characterizational method currently available.

Prof. Rheingold's research explores ways of using X-ray crystallography to provide very rapid and accurate structural characterizations of new compounds in collaboration with members of this department and with several hundred chemists from about fifty other departments worldwide. He welcomes inquiries regarding the establishment of new collaborations, particularly in the areas of inorganic and organometallic chemistry.

His interest in crystallography arose from his research in the synthesis and properties of large cluster structures containing hybrid p-block and transition-metal atoms. These are often paramagnetic solids necessitating crystallographic characterization. A recent example is the di-cubane structure, {[(Cp*CrSe)3Se]2(ยต6-As)}, shown below. It contains Cr in a non-integral oxidation state and it behaves ferromagnetically at low temperatures. Such hybrid clusters are of interest as precursors to new materials displaying thermoelectric and thermomagnetic properties. Simple tetrahedrane analogues such as [(CO)3CoAs3] are found to be excellent volatile precursors to skudderudite phases useful in high-temperature Seebach-effect applications. Both of these metal/p-block hybrid clusters was formed from p-block hetero- and homo-cyclic precursors; in the cases above: (CH3AsSe)3 and (CH3As)5.

Primary Research Area
Inorganic Chemistry
Interdisciplinary interests

Outreach Activities
Thurgood Marshall College Mentoring Program
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Selected Publications